Vulnerability in Wireshark
CVE-2021-39923
Large loop in the PNRP dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (74.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.000
Affected products
- Wireshark
- Wireshark Foundation — versions >=3.2.0, <3.2.18, >=3.4.0, <3.4.10
- Debian Linux — versions 10.0, 11.0, 9.0
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.json (Third Party Advisory)
- www.wireshark.org/security/wnpa-sec-2021-11.html (Vendor Advisory)
- gitlab.com/wireshark/wireshark/-/issues/17684 (Patch, Issue Tracking, Vendor Advisory)
- www.debian.org/security/2021/dsa-5019 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/12/msg00015.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39923?
- CVE-2021-39923 is a high-severity vulnerability in Wireshark, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2021-11-19.
- How severe is CVE-2021-39923?
- High severity. CVSS v3 base score is 7.5 out of 10.